chore(testing): run Bun tests from runner directory

Author: tomas-zijdemans

_tools/node_test_runner/set_root_cwd.mjs

@@ -0,0 +1,5 @@
+// Copyright 2018-2026 the Deno authors. MIT license.
+
+import { fileURLToPath } from "node:url";
+
+process.chdir(fileURLToPath(new URL("../..", import.meta.url)));

…s/node_test_runner/tsconfig_for_bun.json _tools/node_test_runner/tsconfig.json_tools/node_test_runner/tsconfig_for_bun.json renamed to _tools/node_test_runner/tsconfig.json _tools/node_test_runner/tsconfig_for_bun.json renamed to _tools/node_test_runner/tsconfig.json

@@ -21,7 +21,7 @@
     "test:tools": "deno test -A --doc _tools/",
     "test:browser": "git grep --name-only \"This module is browser compatible.\" | grep -v deno.json | grep -v .github/workflows | grep -v _tools | grep -v encoding/README.md | grep -v media_types/vendor/update.ts | xargs deno check --config browser-compat.tsconfig.json",
     "test:node": "(cd _tools/node_test_runner && npm install) && node --import ./_tools/node_test_runner/register_deno_shim.mjs ./_tools/node_test_runner/run_test.mjs",
-    "test:bun": "(cd _tools/node_test_runner && bun install) && bun test --tsconfig-override ./_tools/node_test_runner/tsconfig_for_bun.json --require ./_tools/node_test_runner/register_deno_shim.mjs _tools/node_test_runner/run_test.mjs",
+    "test:bun": "(cd _tools/node_test_runner && bun install && bun test --preload ./set_root_cwd.mjs --require ./register_deno_shim.mjs ./run_test.mjs)",
     "lint:circular": "deno run --allow-env --allow-read --allow-write --allow-net=deno.land,jsr.io ./_tools/check_circular_package_dependencies.ts",
     "lint:mod-exports": "deno run --allow-env --allow-read ./_tools/check_mod_exports.ts",
     "lint:tools-types": "deno check _tools/*.ts",